CVE-2026-29905

Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://drive.google.com/file/d/1MwvvSYIwnC8kOIzjycGMQZw4d2K2ef8h/view?usp=sharing	Exploit
https://github.com/Stalin-143/CVE-2026-29905	Third Party Advisory
https://github.com/getkirby/kirby/releases/tag/5.2.0-rc.1	Product

Configurations

Configuration 1 (hide)

cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-26 17:16

Updated : 2026-06-17 10:29

NVD link : CVE-2026-29905

Mitre link : CVE-2026-29905

CVE.ORG link : CVE-2026-29905

JSON object : View

Products Affected

getkirby

kirby

CWE

CWE-20

Improper Input Validation

CWE-252

Unchecked Return Value

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